This short course will cover compressor efficiency (components of losses, irreversible losses, cylinder valves, orifices-static & dynamic, installation-manifold losses, piping arrangements, performance measurements cylinder versus line to line) and value analysis (review cost analysis & introduce valueanalysis, calculate the compressor efficiency Value potential, compare BTU/BHP-hr to KwH) and willinclude three case studies (low speed vs. high speed gas fired, low speed gas fired vs. high speed electric, and high speed vs. high speed valve change out).